<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>rose</title>
</head>
<body style="text-align: center">
    <h1 id="h1" onclick="_click();">送你一朵花</h1>
    <canvas id="canvas" height="500" width="500" style="text-align: center" onclick="_click()">
    </canvas>
</body>
<script type="text/javascript">
    var b = document.body;
    var c = document.getElementsByTagName('canvas')[0];
    var a = c.getContext('2d');
    document.body.clientWidth;
    with (m = Math)
        C = cos, S = sin, P = pow, R = random;
    c.width = c.height = f = 500;
    h = -250;
    function p(a, b, c) {
        if (c > 60)
            return [ S(a * 7) * (13 + 5 / (.2 + P(b * 4, 4))) - S(b) * 50,
                    b * f + 50,
                    625 + C(a * 7) * (13 + 5 / (.2 + P(b * 4, 4))) + b * 400,
                    a * 1 - b / 2, a ];
        A = a * 2 - 1;
        B = b * 2 - 1;
        if (A * A + B * B < 1) {
            if (c > 37) {
                n = (j = c & 1) ? 6 : 4;
                o = .5 / (a + .01) + C(b * 125) * 3 - a * 300;
                w = b * h;
                return [
                        o * C(n) + w * S(n) + j * 610 - 390,
                        o * S(n) - w * C(n) + 550 - j * 350,
                        1180 + C(B + A) * 99 - j * 300,
                        .4
                                - a
                                * .1
                                + P(1 - B * B, -h * 6)
                                * .15
                                - a
                                * b
                                * .4
                                + C(a + b)
                                / 5
                                + P(C((o * (a + 1) + (B > 0 ? w : -w)) / 25),
                                        30) * .1 * (1 - B * B),
                        o / 1e3 + .7 - o * w * 3e-6 ];
            }
            if (c > 32) {
                c = c * 1.16 - .15;
                o = a * 45 - 20;
                w = b * b * h;
                z = o * S(c) + w * C(c) + 620;
                return [ o * C(c) - w * S(c),
                        28 + C(B * .5) * 99 - b * b * b * 60 - z / 2 - h, z,
                        (b * b * .3 + P((1 - (A * A)), 7) * .15 + .3) * b,
                        b * .7 ];
            }
            o = A * (2 - b) * (80 - c * 2);
            w = 99 - C(A) * 120 - C(b) * (-h - c * 4.9) + C(P(1 - b, 7)) * 50
                    + c * 2;
            z = o * S(c) + w * C(c) + 700;
            return [ o * C(c) - w * S(c),
                    B * 99 - C(P(b, 7)) * 50 - c / 3 - z / 1.35 + 450, z,
                    (1 - b / 1.2) * .9 + a * .1, P((1 - b), 20) / 4 + .05 ];
        }
    }
    setInterval(
            'for(i=0;i<1e4;i++)if(s=p(R(),R(),i%46/.74)){z=s[2];x=~~(s[0]*f/z-h);y=~~(s[1]*f/z-h);if(!m[q=y*f+x]|m[q]>z)m[q]=z,a.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")",a.fillRect(x,y,1,1)}',
            0);
			
	// add function click()
	function _click(){
		alert("聪明的人，一定会点到这里的，真棒！");
		console.info("反正也没人能看到这里... ^_^ ");
		unbind();
	}
	
	function unbind(){
		var h1 = document.getElementById('h1');
		h1.onclick= false;
		var canvas = document.getElementById('canvas');
		canvas.onclick = null;
	}
	
	// var h1 = document.getElementById('h1');
	// h1.addEventListener('click',clickx_,false);
	function clickx_(){
		alert("点击到了");
		unclick();
	}
	
	function unclick(){
		var h1 = document.getElementById('h1');
		h1.removeEventListener('click',clickx_,false);
	}
	


	
</script>
</html>
